| In Brief: | The RGO Spectrograph is a general purpose optical spectrograph, covering 3100-11000Å. The 25cm camera can be used for long-slit spectroscopy, time series observations and spectropolarimetry. The 82cm camera has been superseded by UCLES for most applications, but is useful when small spatial pixels are needed (e.g. spectroastrometry). |
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| Instrument Scientist: | No Instrument Scientist at present. Contact Head of Astronomy for information. |
| Manual: | AAO UM-2.4 "The RGO
Spectrograph Manual" by R. A. Stathakis and H. M. Johnston, 2002. "The Medium Dispersion Cu Ar Arc Atlas" by C. G. Tinney, 1995, available online as a gzip'd Postscript file. Other (hardcopy only) related manuals are; AAO UM-24.2 "Spectropolarimetry at the AAT" by J. Hough & J. Bailey, 1994; and AAO UM 4 and 4a, Arc Atlases for CuAr and FeAr. |
| Other Info: | Information on the
different gratings
is available. Wavelength centres and coverage for grating settings can be calculated using the RGOANG spectrograph facility. There is an entry in the Observer's Guide |
Fact Sheet: |
|
| Detector: | Portable CCD, usually the 2k x 4k EEV or MITLL CCDs. |
| Focal Station: | Mounted at the Cassegrain focus with f/8 top end. |
| Image Scale: | 0.43 arcsec per pixel with 25cm + EEV (unbinned) |
| Spectral Resolution*: | A range of gratings offer R=850 (250B) to R=12 000 (1200l, 2nd order) at 6000Å with 1.7 arcsec slit. |
| Filters: | A range of neutral density and order sorting filters are available. |
| Sensitivities: | Signal-to-Noise calculator |
| *Spectral Resolution R measured as lambda/delta_lambda, delta_lambda = FWHM unresolved line, usually 2 pixels. | |
